Alright, let's work through 51991182 times 84036545 step by step
51991182 × 84036545 = 84036545 × (51991182)
+ 84036545 × 2 that results in 168073090
+ 84036545 × 80 producing 6722923600
+ 84036545 × 100 producing 8403654500
+ 84036545 × 1000 that is equal 84036545000
+ 84036545 × 90000 what gives us 7563289050000
+ 84036545 × 900000 that is equal 75632890500000
+ 84036545 × 1000000 giving us 84036545000000
+ 84036545 × 50000000 resulting in 4201827250000000

= 4369159305746190
